import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '@/components/login.vue'
import Home from '@/components/home.vue'
import Welcome from '@/components/welcome.vue'
import Users from '@/components/user/users.vue'
import Rights from '@/components/powel/rights.vue'
import Roles from '@/components/powel/roles.vue'
Vue.use(VueRouter)

const routes = [
  {
    path:'/',
    redirect:'/login'
  },
  {
    path:'/login',
    component:Login
  },
  {
    path:'/home',
    component:Home,
    redirect:'/welcome',
    children:[
      {
        path:'/welcome',
        component:Welcome
      },
      {
        path:'/users',
        component:Users
      },
      {
        path:'/rights',
        component:Rights
      },
      {
        path:'/roles',
        component:Roles
      }
    ]
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})
//路由导航守卫
router.beforeEach((to,from,next) => {
   //to 将要访问的路径
   //from 代表从哪个路径跳转而来
   //next 是一个函数 表示放行
   if(to.path === '/login') return next()
   const token = window.sessionStorage.getItem('token')
   if(!token) return next('/login')
   next()
})
//路由导航守卫
export default router
